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Postactivation potentiation

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https://www.readbyqxmd.com/read/27901341/the-efficacy-and-characteristics-of-warm-up-and-re-warm-up-practices-in-soccer-players-a-systematic-review
#1
Amri Hammami, James Zois, Maamer Slimani, Mark Russel, Ezdine Bouhlel
INTRODUCTION: This review aimed (i) to evaluate the current research that examines the efficacy of warm-up (WU) and re-warm-up (RWU) on physical performance, and (ii) to highlight the WU and RWU characteristics that optimise subsequent performance in soccer players. EVIDENCE ACQUISITION: A computerized search was performed in the PubMed, ScienceDirect and Google Scholar (from 1995 to December 2015) for English-language, peer- reviewed investigations using the terms "soccer" OR "football" AND "warm-up" OR "stretching" OR "post-activation potentiation" OR "pre-activity" OR "re-warm-up" AND "performance" OR "jump" OR "sprint" OR "running"...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27741057/influence-of-rest-intervals-following-assisted-sprinting-on-bodyweight-sprint-times-in-female-collegiate-soccer-players
#2
Austyn L Nealer, Dustin D Dunnick, Kylie K Malyszek, Megan A Wong, Pablo B Costa, Jared W Coburn, Lee E Brown
Speed is a crucial element an athlete must possess to be successful. In soccer, the ability to accelerate faster than your opponent can result in being first to reach a ball on a breakaway or stopping a counter attack. A unique way to train explosive movements is to evoke postactivation potentiation (PAP) in the working muscles. Traditionally, an overload stimulus with a long rest period is used, but a model utilizing an overspeed stimulus with shorter rest periods is less understood. Therefore, the purpose of this study was to determine the acute effects of varied rest intervals following assisted sprinting on bodyweight sprint time...
October 6, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27736266/effects-of-plyometric-vs-concentric-and-eccentric-conditioning-contractions-on-upper-body-postactivation-potentiation
#3
Gert Ulrich, Mario Parstorfer
PURPOSE: There is limited data on postactivation potentiation (PAP) effects following plyometric conditioning contractions (CC), especially in the upper body. Therefore, the study compared plyometric CC with concentric-eccentric and eccentric CC aiming to improve upper body power performance due to a PAP-effect. METHODS: Sixteen resistance-trained males completed three experimental trials in a randomized order which composed of either a plyometric (PLY), a concentric-eccentric (CON) or an eccentric-only (ECC) CC...
October 13, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27669181/the-effects-of-accentuated-eccentric-loading-on-the-drop-jump-exercise-and-the-subsequent-postactivation-potentiation-response
#4
Lee A Bridgeman, Michael R McGuigan, Nicholas D Gill, Deborah Dulson
The aims of this study were to (A) investigate the acute effects of different drop jump (DJ) accentuated eccentric loading (AEL) protocols and (B) to investigate the effect of these AEL DJ protocols on subsequent countermovement jump (CMJ) performance. The subjects were 12 strength-trained athletes, initially, baseline CMJ performance was assessed and individual optimal DJ drop height identified. In subsequent weeks subjects completed 1 set of 5 DJ's with no additional load or an AEL of 10, 20 or 30% of their individual body mass (BM) utilising dumbbells to provide the extra load...
September 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27447016/adding-whole-body-vibration-to-preconditioning-exercise-increases-subsequent-on-ice-sprint-performance-in-ice-hockey-players
#5
Bent R Rønnestad, Gunnar Slettaløkken, Stian Ellefsen
The phenomenon postactivation potentiation can possibly be used to acutely improve sprint performance. The purpose of this study was to investigate the effect of body-loaded half-squats with added whole body vibration (WBV) on subsequent 20 m on-ice sprint performance. Fifteen male ice-hockey players performed 4 test sessions on separate days and in a randomized order. Two of this test sessions were with WBV and 2 were with noWBV and the best sprint time was used to determine effectiveness. Each test session included preconditioning 30 seconds half-squat exercise, 2 of which were supplemented with 50 Hz WBV at a amplitude of 3 mm...
April 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27361832/comparison-of-hex-bar-deadlift-vs-back-squat-postactivation-potentiation-on-vertical-jump-takeoff-velocity-3263-board-328-june-3-3-30-pm-5-00-pm
#6
Cameron N Munger, Whitney D Leyva, David C Archer, Andrew J Galpin, Jared W Coburn, Lee E Brown
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27256788/postactivation-potentiation-of-dynamic-conditioning-contractions-on-rowing-sprint-performance
#7
Kenji Doma, Wade H Sinclair, Sarah R Hervert, Anthony S Leicht
OBJECTIVES: This study examined the post-activation potentiation effects of maximal dynamic contractions and gender on rowing sprint ability. DESIGN: Repeated measures. METHODS: Thirty-four male (n=17) and female (n=17) university students with experience in rowing took part in this study conducted across three weeks. Following familiarisation of the 10-second maximal rowing performance test on a rowing ergometer during Week 1, participants were randomly allocated to either complete a control or experimental session during Week 2 and 3...
May 12, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27182310/exercise-bouts-at-three-different-intensities-fail-to-potentiate-concentric-power
#8
Chad A Cabrera, Jacobo Morales, Felicia Greer, Robert W Pettitt
Postactivation potentiation (PAP) has been hypothesized previously to occur during voluntary, concentric actions. We tested the hypothesis that one of at least three different intensities of conditioning exercises would evoke potentiation of power during the concentric, bench press throw (BPT). Twelve men (age = 22.9 ± 2.7 years, bench press 1 repetition maximum (1RM) = 1.20 ± 0.12 kg·kg(-1) body weight) completed five isotonic conditioning presses at ~55, 70, and 86% 1RM, in counterbalanced order, and on separate days...
2009: International Journal of Exercise Science
https://www.readbyqxmd.com/read/26988769/relationships-between-maximal-strength-muscle-size-and-myosin-heavy-chain-isoform-composition-and-postactivation-potentiation
#9
Laurent B Seitz, Gabriel S Trajano, G Gregory Haff, Charles C L S Dumke, James J Tufano, Anthony J Blazevich
The purpose of this study was to examine the relationships between maximal voluntary postactivation potentiation (PAP) and maximal knee extensor torque, quadriceps cross-sectional area (CSA) and volume, and type II myosin heavy chain (MHC) isoform percentage in human skeletal muscle. Thirteen resistance-trained men completed a test protocol consisting of 2 isokinetic knee extensions at 180°·s(-)(1) performed before and 1, 4, 7, and 10 min after the completion of 4 maximal knee extensions at 60°·s(-)(1) (i...
May 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/26959056/the-effects-of-creatine-supplementation-on-explosive-performance-and-optimal-individual-postactivation-potentiation-time
#10
Chia-Chi Wang, Ming-Ta Yang, Kang-Hao Lu, Kuei-Hui Chan
Creatine plays an important role in muscle energy metabolism. Postactivation potentiation (PAP) is a phenomenon that can acutely increase muscle power, but it is an individualized process that is influenced by muscle fatigue. This study examined the effects of creatine supplementation on explosive performance and the optimal individual PAP time during a set of complex training bouts. Thirty explosive athletes performed tests of back squat for one repetition maximum (1RM) strength and complex training bouts for determining the individual optimal timing of PAP, height and peak power of a counter movement jump before and after the supplementation...
March 2016: Nutrients
https://www.readbyqxmd.com/read/26813632/influence-of-postactivation-potentiation-on-shot-put-performance-of-collegiate-throwers
#11
Lawrence W Judge, David M Bellar, Bruce W Craig, Erin L Gilreath, Scott A Cappos, Ashley B Thrasher
The purpose of this investigation was to determine the acute effects of heavy and light implements on subsequent overhead back (OHB) shot put performance with a competition weight shot put. This investigation was designed to test the efficacy of heavy implements for potentiating subsequent OHB performance. Participants included 41 athletes (20.9 ± 1.18 years.) from 2 National Collegiate Athletic Association Division I schools in the Midwestern United States (n = 23 male and n = 18 female). Mean distance for OHB throw with a competition shot put was examined after treatment (control, light shot put warm-up, and heavy shot put warm-up) through repeated-measures analysis of variance (ANOVA) with post hoc Bonferroni-corrected post hoc analysis...
February 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26712510/understanding-vertical-jump-potentiation-a-deterministic-model
#12
REVIEW
Timothy J Suchomel, Hugh S Lamont, Gavin L Moir
This review article discusses previous postactivation potentiation (PAP) literature and provides a deterministic model for vertical jump (i.e., squat jump, countermovement jump, and drop/depth jump) potentiation. There are a number of factors that must be considered when designing an effective strength-power potentiation complex (SPPC) focused on vertical jump potentiation. Sport scientists and practitioners must consider the characteristics of the subject being tested and the design of the SPPC itself. Subject characteristics that must be considered when designing an SPPC focused on vertical jump potentiation include the individual's relative strength, sex, muscle characteristics, neuromuscular characteristics, current fatigue state, and training background...
June 2016: Sports Medicine
https://www.readbyqxmd.com/read/26562707/acute-effects-of-loaded-half-squat-jumps-on-sprint-running-speed-in-track-and-field-athletes-and-soccer-players
#13
Marián Vanderka, Matúš Krčmár, Katarína Longová, Simon Walker
Vanderka, M, Krčmár, M, Longová, K, and Walker, S. Acute effects of loaded half-squat jumps on sprint running speed in track and field athletes and soccer players. J Strength Cond Res 30(6): 1540-1546, 2016-The purpose of the study was to determine the acute responses to a jump squat protocol designed to induce postactivation potentiation on sprint running performance in experienced track and field athletes and soccer players. Twenty-five regional level athletes (12 track and field: ∼17 years; ∼177 cm; ∼73 kg and 13 soccer: ∼18 years; ∼175 cm; ∼72 kg) performed 2 test sessions assessing 40-m sprint running performance in a balanced, crossover design...
June 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26449966/muscular-endurance-training-and-motor-unit-firing-patterns-during-fatigue
#14
Joni A Mettler, Lisa Griffin
With muscular training, the central nervous system may regulate motor unit firing rates to sustain force output and delay fatigue. The aims of this study were to investigate motor unit firing rates and patterns of the adductor pollicis (AdP) muscle in young, able-bodied adults throughout a sustained submaximal isometric fatiguing contraction and postactivation potentiation pre-post 4 weeks of muscular endurance training. Fifteen participants (training group: N = 10; control group: N = 5) performed maximal voluntary contractions (MVCs) and a sustained isometric 20 % MVC fatigue task pre-post training...
January 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/26423125/involvement-of-mitochondrial-activity-and-oxphos-in-atp-synthesis-during-the-motility-phase-of-spermatozoa-in-the-pacific-oyster-crassostrea-gigas
#15
Myrina Boulais, Philippe Soudant, Nelly Le Goïc, Claudie Quéré, Pierre Boudry, Marc Suquet
In the Pacific oyster, spermatozoa are characterized by a remarkably long movement phase (i.e., over 24 h) sustained by a capacity to maintain intracellular ATP level. To gain information on oxidative phosphorylation (OXPHOS) functionality during the motility phase of Pacific oyster spermatozoa, we studied 1) changes in spermatozoal mitochondrial activity, that is, mitochondrial membrane potential (MMP), and intracellular ATP content in relation to motion parameters and 2) the involvement of OXPHOS for spermatozoal movement using carbonyl cyanide m-chlorophenyl hydrazone (CCCP)...
November 2015: Biology of Reproduction
https://www.readbyqxmd.com/read/26308830/lunging-exercise-potentiates-a-transient-improvement-in-neuromuscular-performance-in-young-adults
#16
Sean A Horan, Steven L Watson, Conor Lambert, Benjamin K Weeks
High-load resistance-based exercise is a common approach to facilitating improved neuromuscular performance via postactivation potentiation. Popular field-based warm-up activities, however, have been largely overlooked despite their specificity and practicality for sports performance. Therefore, the aim of this study was to investigate the effect of repeated bouts of alternating lunges on neuromuscular performance determined by a maximal vertical jump (VJ). Forty-three healthy young adults (24 women and 19 men: age, 25...
September 2015: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26108955/transspinal-constant-current-long-lasting-stimulation-a-new-method-to-induce-cortical-and-corticospinal-plasticity
#17
Maria Knikou, Luke Dixon, Danielle Santora, Mohamed M Ibrahim
Functional neuroplasticity in response to stimulation and motor training is a well-established phenomenon. Transcutaneous stimulation of the spine is used mostly to alleviate pain, but it may also induce functional neuroplasticity, because the spinal cord serves as an integration center for descending and ascending neuronal signals. In this work, we examined whether long-lasting noninvasive cathodal (c-tsCCS) and anodal (a-tsCCS) transspinal constant-current stimulation over the thoracolumbar enlargement can induce cortical, corticospinal, and spinal neuroplasticity...
September 2015: Journal of Neurophysiology
https://www.readbyqxmd.com/read/26084911/postactivation-depression-of-the-ia-epsp-in-motoneurons-is-reduced-in-both-the-g127x-sod1-model-of-amyotrophic-lateral-sclerosis-and-in-aged-mice
#18
A Hedegaard, J Lehnhoff, M Moldovan, L Grøndahl, N C Petersen, C F Meehan
Postactivation depression (PActD) of Ia afferent excitatory postsynaptic potentials (EPSPs) in spinal motoneurons results in a long-lasting depression of the stretch reflex. This phenomenon (PActD) is of clinical interest as it has been shown to be reduced in a number of spastic disorders. Using in vivo intracellular recordings of Ia EPSPs in adult mice, we demonstrate that PActD in adult (100-220 days old) C57BL/6J mice is both qualitatively and quantitatively similar to that which has been observed in larger animals with respect to both the magnitude (with ∼20% depression of EPSPs at 0...
August 2015: Journal of Neurophysiology
https://www.readbyqxmd.com/read/25995355/reduced-postactivation-depression-of-soleus-h-reflex-and-root-evoked-potential-after-transcranial-magnetic-stimulation
#19
Jennifer C Andrews, Richard B Stein, François D Roy
Postactivation depression of the Hoffmann (H) reflex is associated with a transient period of suppression following activation of the reflex pathway. In soleus, the depression lasts for 100-200 ms during voluntary contraction and up to 10 s at rest. A reflex root evoked potential (REP), elicited after a single pulse of transcutaneous stimulation to the thoracolumbar spine, has been shown to exhibit similar suppression. The present study systematically characterized the effect of transcranial magnetic stimulation (TMS) on postactivation depression using double-pulse H reflexes and REPs...
July 2015: Journal of Neurophysiology
https://www.readbyqxmd.com/read/25968229/postactivation-potentation-effects-from-accommodating-resistance-combined-with-heavy-back-squats-on-short-sprint-performance
#20
Timothy P Wyland, Joshua D Van Dorin, G Francis Cisco Reyes
Applying accommodating resistance combined with isoinertial resistance has been demonstrated to be effective in improving neuromuscular attributes important for sport performance. The main purpose of this study was to determine whether short sprints can be acutely enhanced after several sets of back squats with or without accommodating resistance. Twenty recreationally resistance-trained males (age: 23.3 ± 4.4 years; height: 178.9 ± 6.5 cm; weight: 88.3 ± 10.8 kg) performed pre-post testing on 9.1-m sprint time...
November 2015: Journal of Strength and Conditioning Research
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